51644771 has 2 divisors, whose sum is σ = 51644772. Its totient is φ = 51644770.

The previous prime is 51644743. The next prime is 51644777. The reversal of 51644771 is 17744615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51644771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51644777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25822385 + 25822386.

It is an arithmetic number, because the mean of its divisors is an integer number (25822386).

Almost surely, 2^51644771 is an apocalyptic number.

51644771 is a deficient number, since it is larger than the sum of its proper divisors (1).

51644771 is an equidigital number, since it uses as much as digits as its factorization.

51644771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 51644771 is about 7186.4296420406. The cubic root of 51644771 is about 372.3992394466.

The spelling of 51644771 in words is "fifty-one million, six hundred forty-four thousand, seven hundred seventy-one".